/Engine/Plugins/Online/OnlineFramework/Source/Rejoin/Public/RejoinCheck.h
Possible end conditions that a rejoin attempt can be in after a user indicates intent to rejoin a session
enum ERejoinAttemptResult { RejoinFailure, RejoinInProgress, RejoinSuccess, NothingToRejoin, InvalidSessionFailure, JoinSessionFailure, RejoinTravelFailure, }